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(N0 Models 2' Sheets-Sheet 1.

O. WAGNER.

APPARATUS FOR PREPARINGLIQUID UOFFEE.

Patented Mar. 19, 1889.

(No Model.) 2 Sheets-Sheet 2.

0. WAGNER. APPARATUS FOR PREPARING LIQUID COFFEE.

No. 399,803. Patented Mar. 19, 1889.

UNITED STATES PATENT OFFICE.

CARL VAGNER, OF DRESDEN, SAXONY, GERMANY.

APPARATUS FOR PREPARING LIQUID COFFEE.

SPECIFICATION forming part of Letters Patent No. 399,803, dated Ixiarch 19, 1889. Application filed March 23,1888. Serial No. 268,252. (No model.) Patented in Germany May 3, 1887, No. 41,69-

To all whom it may concern.-

Be it known that I, CARL IVAGNER, manufacturer, of Dresden, in the Kingdom of Saxony and German Empire, have invented an Improved Apparatus for Preparing a Liquid Coffee Drink of Fresh Unroasted Coffee, (for which I have obtained a patent in Germany under No. 41,649, dated May 3, 1887,) of which the following is a specification.

My invention relates to an improved apparatus for preparing liquid coifee drink of fresh unroasted coffee, the coffee-beans being first roasted and then ground in the machine and the beverage prepared with the water boiled in the machine.

In the accompanying drawings, Figure 1 is a longitudinal section through the machine, some parts on the right-hand side of which are shown in full view. Fig. 2 is a cross-see tion through the roasting and grinding drum on the line 1 2. Fig. 3 shows a cross-section through the whole machine on the line 3 4:. A full view of the lid is given.

The machine consists of the following parts: the roasting-drum A, in which the coffee beans are roasted and ground; the boiler B, underneath the drum A, for boiling the water as required for the beverage; the strainer O, for immersing the ground oolfee into the boiler B; and the lamp D.

The above parts are inclosed in the easing E.

The drum A is so arranged as to rotate at a a in the casing E. The latter is provided at b with a slit, through which the shaft 0, together with the drum A, can be removed from the casing. The shaft 0 has on one end a small handle, (Z, and is so movably arranged as to slide in the drum A. On the shaft 0 is secured a grinding-disk, c, with a sheet-plate, f. A screw-spring, g, fixed in the drum A, presses the grinding-disk (2 against a second grinding-disk, e, secured in the drum A. Fixed to the shaft 0 is a hook, h, which catches in the eye 2' whenever the shaft c is drawn back. In addition to the above, the drum A is provided with a slide, 12, that has an eye, it, 011 its one side. The hook Z on the shaft on, which is movably arranged, so as to slide in the casing E, can catch in the eye whenever the shaft m is turned in the corresponding direction by means of the handle 0. Underneath the slide n the strainer C is arranged, into which the ground coffee is put. The grinding-disks e e are provided, like rasps, with grinding-edges and holes in such a way that the roasted coffee put in between these two grinding-disks is pulled in a ground condition to the spaces F F of the drum A whenever the grinding-disk e is made to rotate against the other grinding disk, 6'. The strainer C is immersed in the boiler B, which is filled with the water required for the beverage. The boiler B is a cylinder with a conical space, H, in its middle, and is provided with a cook, 19, to let off the coffee beverage when prepared. Underneath the said boiler is the lamp D, the fiame of which heats the bottom of the boiler B and its conical sides as soon as the lid q is removed and the flame is lighted. The latter comes also in contact with the drum A and roasts the coffee c011- tained in it.

G is the lid for covering the casing E.

The way in which the apparatus is used is as follows: The drum A is first taken out from the casing E and filled with green coffeebeans. For this purpose the shaft 0 of the drum A is moved out of the drum A to make the hook h catch in the eye t of the drum. The grinding-disk e is moved with the shaft 0 to the right,while the other grinding-disk, 6, remains on its place, so that a hollow space is formed in the drum A between the grindingdisks eand e, which is filled up with coifee as soon as the slide at is opened. After the drum has been filled the slide it is reversed the drum A is revolved by means of the handle (Z, the hook Z having been taken out of the eye It. As soon as the coifee-beans are sufficiently roasted they are ground. This operation is done in the following way: The hook Zis laidinto the eye it on the slide at of the drum A, and as the slide 91 can move in the drum only in the direction of the axle of shaft 6 the drum is consequently secured by hook Z. Then the shaft 0 is revolved, so as to disengage the hook h from the e'jv'e i. The grindingdisk e must necessarily be pressed by the screw-treated spring 9 against the grindingdisk 6. The latter is fastened to the drum A, which at the same time is held stationary, as justdescri'bed, whereas the grinding-disk e is secured on the shaft 0. As soon as the shaft 0 is rotated by means of the handle d, the grinding disk 6 must revolve with it, whereas the grinding-disk 6 remains Without motion, so that the coffee-beans between them are ground. The coffee then falls into the spaces F F behind the grinding-disks. In the meantime the Water in the boiler B has been made to boil by the flame of the lamp D. On opening the slide 41 the ground coffee in the spaces F F falls into the strainer O and is soaked in the boiling water. The coffee beverage thus prepared is then let 01f at the cook 10. As soon as this has been done, the coffeestrainer O is emptied and the function of the apparatus can recommence.

What I claim, and desire to secure by Letters Patent of the United States, is

I. In an apparatus for preparing liquid cof fee, an inclosingcas'e, a drum for roasting the green berries, grinding device in connection with the drum, a boiler below the grinding device with a passage thereto for delivering the ground coffee into the water, a heating device below the boiler, and a flue leading to the roasting-drum, substantially as described,

for the purpose specified. 1

2. In an apparatus for preparing liquid coffee, an inclosing-ca-se, a drum for roasting the green berries, a grinding device in connection with the drum, a boiler below the grinding device, a strainer within the boiler having its upper end below the grinding device, a passage from the grinding device to the said strainer, a heating device below the boiler, and a fine leading to the drum, substantially as described, for the purpose specified.

In witness whereof I have hereunto set my hand in presence of two witnesses.

CARL \VAGNER.

Witnesses ADOLF LUTHER, EDMUND GOHLER. 

